I doubt they are messing with you, but they are likely trying to steer you away from doing academic prep or trying to pre-study. If you feel like you must do something, trying to boost your coping skills or learning stress relief technicians won't hurt you, while pre-studying can sometimes have more of a detrimental effect than a positive one. Enjoy the time you have before medical school and spend time with people you care about.
Set things up as easy as you can for when class starts. Get your financial aid figured. Make sure you secure housing, utilities, etc. at least a couple of weeks before the semester starts - don't try to move across country on Friday before school starts on Monday. Maybe find a doctor/pharmacy/counselor/dentist/eye doctor in the area so you don't have to do the research on that when you need it. But enjoy yourself - you don't need to prepare for eight months.
I don't think poor mental health is the main reason for dropping out, but it is sometimes a contributing factor, especially when it isn't acknowledged. Anxiety, depression, and other mental illness often first manifest during periods of high stress (ex, medical school), and some people also struggle with homesickness or social isolation after moving to a new area for medical school. If your school has free counseling available, make an appointment and meet a counselor, even if just to talk through some of your worries about medical school. It makes it a lot easier to go when you do need it, later. And if you find yourself needing help, go talk to a counselor - it's not impossible to bounce back from failing a test, or even a class, but if the underlying reason for failure is mental illness, you need to seek help for it.
